I bought a Neewer
Nikon G to Sony NEX adapter hoping that it would cut some weight
off Fotodiox adapter I own, as well as not
have the light leaking issue and be a better fit, as the Fotodiox is a
bit loose on the Nikon F mount side of things. Like the Fotodiox the
release lever lets light into the adapter, which, in certain
situations, can cause some huge issues. The fit is better, lenses are
more secure on the Neewer adapter, but unfortunately the quality is hit
or miss too. On mine, the lens release button often gets stuck
requiring a pocketknife and some prying to release the lens from the
adapter. The aperture adjustment ring also has moments where it sticks
while changing aperture. You get what you pay for, and this case less.
The adapter lasted about a month before falling apart.